METHOD OF PRODUCING MODIFIED CONJUGATED DIENE POLYMER, MODIFIED POLYMER AND RUBBER COMPOSITION Russian patent published in 2012 - IPC C08C19/42 C08L9/00 C08L9/06 C08L21/00 C08K3/04 C08K3/36 

FIELD: chemistry.

SUBSTANCE: invention relates to a method of producing a modified (co)polymer based on a conjugated diene, a modified (co)polymer based on a conjugated diene and a rubber composition. The method involves a step (a) for obtaining primarily modified polymer as a result of a primary modification reaction, where one component selected from a group consisting of an alkoxy silane compound and a silanol compound is introduced into an alkali metal-containing active terminal group of the (co)polymer based on the conjugated diene, and a step (b) for obtaining a secondarily modified (co)polymer based on a conjugated diene as a result of conducting reactions, including step (b1) and step (b2) for the obtained primarily modified polymer. Step (b1) includes a reaction with a condensation accelerator containing a metal element. Step (b2) includes a reaction with one component selected from a group consisting of inorganic acids and metal halides.

EFFECT: invention enables to obtain a (co)polymer based on a conjugated diene, characterised by high Mooney viscosity and excellent stability of shape, and a composition with low heat release and improved wear resistance.

13 cl, 8 tbl, 16 ex